package com.gph.saviorframework.util;

import java.util.ArrayList;
import java.util.List;

public class ListUtils {

    public static  <T> List<List<T>> splitList(List<T> list, int pageSize) {
        int listSize = list.size();
        int page = (listSize + (pageSize - 1)) / pageSize;

        List<List<T>> listArray = new ArrayList<List<T>>();
        for (int i = 0; i < page; i++) {
            List<T> subList = new ArrayList<T>();
            for (int j = 0; j < listSize; j++) {
                int pageIndex = ((j + 1) + (pageSize - 1)) / pageSize;
                if (pageIndex == (i + 1)) {
                    subList.add(list.get(j));
                }
                if ((j + 1) == ((j + 1) * pageSize)) {
                    break;
                }
            }
            listArray.add(subList);
        }
        return listArray;
    }

    public static  <T> List<T> splitList(List<T> list, int start,int pageSize) {
        return splitList(list,pageSize).get(start-1);
    }

    public static void main(String[] args){
        List<String> strings = new ArrayList<>();
        for(int i=0;i<100;i++){
            strings.add(String.valueOf(i));
        }
        List<String> res=splitList(strings,1,10);
        assert res.size()>0;
    }
}
